300% Enhancement of Carrier Mobility in Uniaxial-Oriented Perovskite Films Formed by Topotactic-Oriented Attachment

Kim, Dong Hoe; Park, Jaehong; Li, Zhen; Yang, Mengjin; Park, Ji -Sang; Park, Ik Jae; Kim, Jin Young; Berry, Joseph J.; Rumbles, Garry; Zhu, Kai

doi:10.1002/adma.201606831

Title: 300% Enhancement of Carrier Mobility in Uniaxial-Oriented Perovskite Films Formed by Topotactic-Oriented Attachment

Journal Article · Tue Apr 18 04:00:00 UTC 2017 · Advanced Materials

DOI: https://doi.org/10.1002/adma.201606831 · OSTI ID:1364160

Kim, Dong Hoe ^[1]; Park, Jaehong ^[1]; Li, Zhen ^[1]; Yang, Mengjin ^[1]; Park, Ji -Sang ^[2]; Park, Ik Jae ^[3]; Kim, Jin Young ^[3]; Berry, Joseph J. ^[1]; Rumbles, Garry ^[4]; Zhu, Kai ^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)
Argonne National Lab. (ANL), Lemont, IL (United States)
Seoul National Univ., Seoul (Korea)
National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)

Organic-inorganic perovskites with intriguing optical and electrical properties have attracted significant research interests due to their excellent performance in optoelectronic devices. Recent efforts on preparing uniform and large-grain polycrystalline perovskite films have led to enhanced carrier lifetime up to several microseconds. However, the mobility and trap densities of polycrystalline perovskite films are still significantly behind their single-crystal counterparts. Here, a facile topotactic-oriented attachment (TOA) process to grow highly oriented perovskite films, featuring strong uniaxial-crystallographic texture, micrometer-grain morphology, high crystallinity, low trap density (≈4 x 10¹⁴ cm^-3), and unprecedented 9 GHz charge-carrier mobility (71 cm² V^-1 s^-1), is demonstrated. TOA-perovskite-based n-i-p planar solar cells show minimal discrepancies between stabilized efficiency (19.0%) and reverse-scan efficiency (19.7%). In conclusion, the TOA process is also applicable for growing other state-of-the-art perovskite alloys, including triple-cation and mixed-halide perovskites.

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Research Organization:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1364160

Report Number(s):: NREL/JA--5900-68431

Journal Information:: Advanced Materials, Journal Name: Advanced Materials Journal Issue: 23 Vol. 29; ISSN 0935-9648

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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14 SOLAR ENERGY
36 MATERIALS SCIENCE
carrier mobility
orientation
perovskite films
solar cells
topotactic-oriented attachment

Title: 300% Enhancement of Carrier Mobility in Uniaxial-Oriented Perovskite Films Formed by Topotactic-Oriented Attachment

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